Oil and air pumping system



Patented'May 12, 1925.

UNITED. STATES PATENT OFFICE.A

AI ILLIAM L. MORRIS, 0F CHICAGO, ILLINOIS, .ASSIGNOR TO ELECTROIL SYNDICATE,

OF CHICAGO, ILLINOIS, AN ASSOCIATI ON COMPOSED OF C. P. JAEGER, L. M. RUT- LEDGE, WILLIAM L. MORRIS, AND IVILLIAM K. BOOTH.

on'J AND AIR PUMPING SYSTEM.

Application led September To all whom it may concern.'

Be it known that I, WILLIAM L. Monats, a citizen of the United States, residing `at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in an Oil and Air Pumping System, of which the following 'is a specification. l

This invention relates particularly to a system for pumping liquid fuel to a heating furnace, nalthough it mayhave a more general application wherever it can be used. Among the principal objects of the invention are: to provide a single pump for pumping both airand liquid; zto separate the air and liquid; to control the suction of air and liquid; and in general, t-o produce a system having the construction and operation herein described.

In the accompanying drawing, Fig. 1 `rshowsy the general system of pumping oil and air, together with the necessary parts, in accordancenwith the principles of this invention; Fig. 2 is an enlarged sectional view of the float control suction valve; and Fig. 3 is another view of the packed plunger shown in Fig. 2.

In burning a liquid fuel it is desirable to supply air'with the fuel in order -properly to support combustion, and instead of employing two or more separate pumping outfits for accomplishing this result, the present invention provides only a single pump in connection with an air-tight separating .tank for accomplishing the desired result. This system comprises a separating tank 1, a motor 2, a pump 3, and a float operated suction valve 4. An ordinary oil storage tank 5 is provided at a distance from the separating tank and connected to the separating tank is a burner 7 which feeds a furnace 6.

A coupling-8 joins the motor and pump, and extending from the pump is a suction line 9 and a discharge line 10. The discharge line extends into the separating tank 1 through 'a stuffing box 1'1and has holes 12 above the oil line in the tank for discharging air, and an open end 13 for discharging oil below the oil line thereby minimizing agitation Yin the separator.

The suction line 9 is connected to the valve 4, and an oil suction pipe 14 extends from the valve into the supply tank 5 with a strainer 15 at its lower end. An air suction 18, 1922. Serial No. 588,768.

pipe 16 also eXtends'fl-om the valve 4 to a point higher than the supply tank 5 with a suction strainer 17 at its upper end. lVithin the separator tank is a float 18 pivoted at its end 19 upon lugs 20 projecting downward from the underside of the tank cover plate 21 upon which the motor 2 and pump 3 are mounted. Connecting links 22 are attached to the float adjacent its pivot point and at the other ends to a cross pin 23 vfor operating the float valve, shown more clearly in Fig. 2. The separator tank may also be provided with try cocks 24 above and below the normal oil level so that it can be determined whether the oil line is between the two levels.

Oil is delivered fromfthe separator l'to the burner 7 through a pipe line 25 and air through a pipe line 26. A pressure relief valve 27 may be connected to the air line 26 and an oil regulating valve 7 a may be provided in the oil line 25. A pressure gauge 28 is usually attached to the top of the separator tank and there is a drain outlet plug 29 at the bottom of the tank.

Details of the suction control valve are shown more clearlyin Figs. 2 and 3 compris'- ing a body 30 having connections for the oil suction pipe 14, the pump suction 9 and the air suction 16. Within the body 30 is an oil closing valve plunger 31 for which there is an oil valve seat 32 corresponding to the oil valve face 33 with vanes'above t-he seat face to offer resistanceand permit a long travel of the valve from minimum to maximum oil flow position. The interior of the lower portion ofthe valve plunger 31 is hollow and below the valve seatpface 31 are ports 34 permitting oil to pass into the center of the plunger. Surrounding the central portion of the plunger is a depending shell 30a adjacent which is the air inlet 16. At the lower end of the plunger is a valve face 35 and in the body member 30 is a corresponding air valve seat 36 below the air inlet 16.

A plunger rod 37 extends upwardly through the plunger 31 and is attached to the upper rend thereof and to a packing retainer 38 at the lower end. Packing 39 surrounds the retainer for a portion of its length with a Spring 40 pressing a washer 41 against the packing to keep it expanded in its portion of the body member. -A sleeve 42 surrounding the packing retainer 38 and held in place by the cross pin 33 providesa iXed abutment for the packing 39 against which the spring 40 may press it. Slots 43 are provided at the lower end of themember 38 and the sleeve 42 for receiving the upper ends of the links 22, as shown moreclearly in Fig. 1.

In operation the valve 7'* for controlling the burner is set for a certain amount of opening of the burner 7, the relief valve 27 is set for a certain amount of pressure, and the capacity of the pump 3 is fixed and constant; for this condition the suction regulating valve Will assume a substantially fixed position and Will be without movement. `As the quant-ity of oil delivered through the pipe connection 25 and the valve 7a is varied, so also Will the oil line in the separator 1 vary, the minimum oil How causing the float 18 to assume a high position and the maximum iiow, the low (but not the lowest) position. `The vlower face of the plunger approaches the suction air valve seat 36 as the air. suction closes, and the oil valve 33 opens. As the air valve closes the air passage being restricted causes a high velocity of air in this valve 4 and creates a greater suction for the oil passing through the center of the plunger 31 thus causing a greater delivery of oil to the separator tank 1. Thus the supply of oil to the separator tank is automatically maintained by the float in connection with the valve 4, and in regular operation oil Will be continuously passing through the pump 3 together With'the air keeping the pump thoroughly lubricated at all times. Y The action ofthe pump produces a pressure in the separator tank 1 sufficient to discharge liquid fuel through the control valve 7 a depending upon the opening thereof, and the admission of air from the pipe 26 being controlled bythe same valve. Thus it will be seen that oil and air is pumped into the tank 1 the corresponding amounts being regulated automatically by the ioat 18, and the valve 4, the airA and liquid are separated, pressure is applied to the separator tank, and the oil and liquid are delivered separately and under pressure to the burner 7 in any un-atomized state, the amount of liquid depending upon the opening of the controlv valve 7 a.

I claim:

- 1. The combination with a receiver for air and fuel under pressure, of means `for utilizing air and fuel therefrom, a pump having a single receiving and discharge line,

the latter connected with the receiver, a float in the receiver, fuel and air supply pipes, and a double valve connecting the pipes with the receiving line and controlled by the float for continuously regulating the proportions of fuel and air pumped.

2.,-In a pumping system of the class described a slngle pump for both air andliquid, a closed receiver into which lthe -pump discharges, fuel and air supply pipes, a valve for connecting the pipes with a pump including a valve member for oppositely opening the connections to the fuel and air supply pipes, and means depending upon .the amount of liquid in the receiver for varying the position of the valve member.

3. The combination with a pump for both air and liquid, of a closed receiver into which the pump discharges, a double valve comprising a slidable member for controlling the admission of air and liquid to the pump, and ioat controlled means in the receiver for operating the valve by moving the slidable member to vary the amounts of liquids and air admitted to the pump depending upon the amount of liquidin the receiver. l v

. WILLIAM L. MORRIS. 

